2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/216371Using the Major Atmospheric Gamma Imaging Cherenkov Telescope (MAGIC), we have observed the nearest ultra-luminous infrared galaxy Arp 220 for about 15 hours. No significant signal was detected within the dedicated amount of observation time. The first upper limits to the very high energy $γ$-ray flux of Arp 220 are herein reported and compared with theoretical expectations.Accepted for publication in ApJAstrophysicstext